Also the errors appear in the admin dashboard under Extensions - Order Totals - then the specific page of....
handling.tpl &
low_order _fee.tpl

Both these forms are not functional when enabled. I have been trying to locate the source of errors and have been unsuccessful. Any ideas from the community, I used search and could not locate this subject anywhere on forum yet?

Werner
Thank you, your bug fix was applied.
for (handling.tpl) change the ($entry_tax) to ($entry_tax_class) on line 28
for (low_order _fee.tpl) change the ($entry_tax) to ($entry_tax_class) on line 28

Hello, i have recently install boss theme extroic and i have following undefined variable mesgs so how should i solve this with coding or anyother solution plz share with me.
opencart 1.5.6.4 installed ...

Undefined variable: color_css in/customers/9/b/0/bilnavi.se/httpd.www/catalog/view/theme/bt_extroic/template/common/header.tpl on line 22
Notice: Undefined variable: templatecolor in /customers/9/b/0/bilnavi.se/httpd.www/catalog/view/theme/bt_extroic/template/common/header.tpl on line 67
Notice: Undefined variable: header_top in /customers/9/b/0/bilnavi.se/httpd.www/catalog/view/theme/bt_extroic/template/common/header.tpl on line 98
Notice: Undefined variable: boss_megamenu in /customers/9/b/0/bilnavi.se/httpd.www/catalog/view/theme/bt_extroic/template/common/header.tpl on line 108
Notice: Undefined variable: header_bottom in /customers/9/b/0/bilnavi.se/httpd.www/catalog/view/theme/bt_extroic/template/common/header.tpl on line 115
Notice: Undefined variable: footer_top in /customers/9/b/0/bilnavi.se/httpd.www/catalog/view/theme/bt_extroic/template/common/footer.tpl on line 7
Notice: Undefined variable: footer_bottom in /customers/9/b/0/bilnavi.se/httpd.www/catalog/view/theme/bt_extroic/template/common/footer.tpl on line 39